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Application of a substructuring technique to the problem of crack extension and closureA substructuring technique, originally developed for the efficient reanalysis of structures, is incorporated into the methodology associated with the plastic analysis of structures. An existing finite-element computer program that accounts for elastic-plastic material behavior under cyclic loading was modified to account for changing kinematic constraint conditions - crack growth and intermittent contact of crack surfaces in two dimensional regions. Application of the analysis is presented for a problem of a centercrack panel to demonstrate the efficiency and accuracy of the technique.
Document ID
19740022226
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Armen, H., Jr. (Grumman Aerospace Corp. Bethpage, NY, United States)
Date Acquired
September 3, 2013
Publication Date
July 1, 1974
Subject Category
Structural Mechanics
Report/Patent Number
RE-480
NASA-CR-132458
Accession Number
74N30339
Funding Number(s)
CONTRACT_GRANT: NAS1-12198
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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